1371802421 has 32 divisors (see below), whose sum is σ = 1586565120. Its totient is φ = 1174694400.

The previous prime is 1371802361. The next prime is 1371802423. The reversal of 1371802421 is 1242081731.

It is not a de Polignac number, because 1371802421 - 2¹⁸ = 1371540277 is a prime.

It is a super-2 number, since 2×1371802421² = 3763683764522922482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371802423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2215850 + ... + 2216468.

It is an arithmetic number, because the mean of its divisors is an integer number (49580160).

Almost surely, 2^1371802421 is an apocalyptic number.

1371802421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1371802421 is a deficient number, since it is larger than the sum of its proper divisors (214762699).

1371802421 is a wasteful number, since it uses less digits than its factorization.

1371802421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1371802421 is about 37037.8511930700. The cubic root of 1371802421 is about 1111.1273941721.

The spelling of 1371802421 in words is "one billion, three hundred seventy-one million, eight hundred two thousand, four hundred twenty-one".